No mention of what caused the peregrine falcon eggs not to hatch on Springwatch.

Hi Derek,

I thought they were being quite brave by re-visiting the topic after all the concern over it on Springwatch. I wasn't expecting them to answer it on TV but it is still a shame that, when the BBC were contact directly, no proper answer was given. It's a shame that came up really as I really enjoyed Springwatch last season, plenty of good Raptor stories on there this time.